SOUTH BEND, Ind. (AP) _ One of four people accused of conspiring to forge signatures on petitions to place Barack Obama and Hillary Clinton on the state's 2008 presidential primary ballot in northern Indiana has pleaded guilty.

WSBT-TV reports former voter registration worker Beverly Shelton pleaded guilty Thursday to forgery and falsely making a petition as part of a plea agreement. She had been charged along with former St. Joseph County's Democratic Party chairman Butch Morgan and two other voter registration workers.

Morgan and the two others have pleaded not guilty and will stand trial. Morgan resigned in October 2011 following 16 years as the county's Democratic chairman after the South Bend Tribune and the Howey Politics Indiana newsletter reported finding hundreds of questionable signatures.